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Finding the Fourth Proportional to 308,630.88, 462,191.32 and 278,712.72

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Solution

The fourth proportional to 308,630.88, 462,191.32 and 278,712.72 is: 417,387.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,630.88 : 462,191.32 = 278,712.72 : x
  2. Step 2: Convert to fraction form
    308,630.88/462,191.32 = 278,712.72/x
  3. Step 3: Cross multiply
    308,630.88x = 462,191.32 × 278,712.72
  4. Step 4: Simplify right side
    308,630.88x = 128,818,599,957.59
  5. Step 5: Solve for x
    x = 128,818,599,957.59/308,630.88
  6. Step 6: Final answer
    x = 417,387.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.